Can somebody remind me why we use facebook again? The argument that it's somehow more convenient than other communication channels is utter bull shit. It's just herd behaviour.
I use Facebook because it's the only way to communicate with lots of people who are important to me and my life.
Social networks are the definiton of a network effect. They are boring and simple technologically, but are phenomenally valuable when lots of people I care about use them aswell.
You cannot beat facebook with technical solutions, only social solutions.